Automatic controlling device for electrically-heated apparatus.



B. W. BRAWNER. AUTOMATIC CONTROLLING DEVICE FOR ELECTRIGALLY HEATED APPARATUS.

APPLIOATION FILED JUNE 30, 1911.

Patented Oct. 28, 1913.

2 SHEETS-SHEET 1.

B. W. BRAWNER. AUTOMATIC CONTROLLING DEVICE FOR ELEGTRIGALLY HEATED APPARATUS. APPLICATION FILED JUNE so, 1911.

1,077,038. Patented 00t.28,19 13.

2 SHEETS-SHEET 2.

witnesses CIttm-ncgs BUDD'WALL BBAWNER, F AUGUSTA, GEORGIA. A

AUNMA'I'IQGONTIOLLING' DEVICE FOR ELEGTB ICALLY-HEATED APPARATUS.

Specification of Letters Iatent.

Application fled June 30, 1911.

Patented Oct. 28, 1913. Serial in. 035,211.

h To all whom it may concern:

Be' it .known that I, BUDD W. BRAWNER, a citizen of the United States, residing at Augusta, inthe county of Richmond and State of Georgia, have invented certain new and a useful Improvements in Automatic Control-ling'Devices for Electrically-Heated Apparatus; and Iido hereby declare the following to-be a7- full,'clear,and exact description-of the invention, such as will enable others sk'illed in theart to which it appere tains-to' make anduse the same.

Thisinven'tion relates to means for automatically: controlling electrical heating ap- 5 paratus, and the objectis to provide a construction-which shall. be suitable for a variety' of purposes, but is especially adapted for use in connection with an incu ator providedwith electric lamps or other forms-of heat producing .means.

In the accompanying drawings forming a part of this application, Figure 1 is a view of the incubator in front elevation with my improvements applied thereto. Fig. 2 is a top plan view of the construction shown in Fig. 1. Fig. 3 is a view in elevation showing more clearly a the construction shown in Fig. 1. Fig. 4 is a detail View of the construction shown in Fig. 3 but taken from a different angle. Fig. 5 is a detail view showing means for separating the contacts.

In applying my device to the particular use above specified, I employ a casing 10 which may, if desired, be rectangular in cross section and which is provided with a suitable tray or other device for receiving the eggs, this tray being mounted slightly above the bottom of the casing 10. In the front portion of the casing a door 16 is hinged. providin an opening through which the aforesai tray is accessible, and extending transversely of the casing 10, approximately on a'level' with the upper portion of the opening provided for the door, is a framework 17 constituting a partition member. This member may consist merely of a rectangular frame covered with suitable fabric or other material 17', and serving to partition off the upper portion of the casing 10 50 from the central or lower portion thereof,

such upper portion constituting a heating chamber. Within the said heating chamber suitable electric heating means are installed,

and in the present instance I make use of 55 ordinary illuminating incandescent lamps 18 and 19. The number of lights used in binding the incubator will of course be regulated by the size of the latter. The interior ofthe upper portion of the casingconstituting the heating chamber may be lined with asbestos or other suitable material. The partition 17 is supported upon cleats within the easing and is held at its outer end by means of turn-buttons or other suitable devices 20, which when dropped to their lower position permit the front. portion of partition 17 to drop a short distance so that it may be drawn through the doorway at the front.

The electric connection is shown in Fig. 1, the plug for insertion in an ordinary lamp socket being indicated by 21 and the connecting cord by 22. This cord runs to a block 23 with which the lamps are also connected, andfrom block 23 wires 24 24' run to the switch mechanism located on the upper portion of the casing. A plate 25 mounted on the casing is provided with posts 26 and 27 at one end thereof, and at the opposite end with an upstanding member 28 to which the plate 29 is afiixed. One of the contact members is indicated by 30 and is located inplate 29, and the opposite contact member 31 is located immediately beneath member 30 and is made adjust'able by the device 32, shown especially in Fig. 3. Mounted also on the upper portion of the casing is a plate 35 carrying upwardly projecting members 36 and a lug 37 for the purpose of limiting the movement of lever 38. The latter consists of a bar mounted within pivoted member 39 and projecting therefrom, said bar being secured by means of bolt 40. Projecting from members 36 are pins 41, and members 36 are curved downwardly at their extreme ends in such manner as to form a bearing between the ends and members 41. Within each of the bearings thus provided a pin 42 projects laterally from member 3!). An adjusting screw 43 is carried by member 39 and receives the upper end of a vertical rod or wire 44 by means of which the lever 38 is controlled. Vertical rod 44 is inclcsed within a tubular member 45 and projects downwardly to the interior of the casing, carrying on its lower end a U-shaped member 46 secured at 47. A'transverse bar 48 is carried by member 46 and on the opposite ends of the latter expanding devices. to be controlled by the temperature of the compartment, are mounted. These devices each consist of a plurality of disks of different metals, and the upper disk carries a central pin 49 bearing against the end, of bar 50 connected with the aforesaid vertical rod 44:.

The partition 17 carries any suitable device on which a thermometer 55 may be mounted.

From the foregoing description it will be understood that slight variations of the temperature of the interior of the incubator will cause the operation of the controlling rod i i in view of the action of the expanding members, thereby swinging lever 38 an separating the contacts 30 and 31. This will break the circuit and the temperature will drop during the time the lamps are out of circuit, and will of course rise to the proper degree upon the contacts again making the circuit, when. the expanding members have permitted the return of vertical controlling member a l to its former position. Lever 38 is provided with an ad usting device 38? located beneath plate 29, the end of the lever passing through the aperture in the plate.

It may be added that contact member 31 is insulated from plate 25, and one of the binding posts is also insulated therefrom.

The path of the current from 23 is through wire 24, to binding post 27, through the contact members, (by Way of 25 and 29), wire 26, binding post 26, and Wire 24 to block 23.

"What 1 claim is:

In a device of the character described, a bracket, a lug carried by the bracket, a

tion thereof a bearing,

plurality of upwardly extending members forming a part of the aforesaid bracket, a laterally projecting device carried by each of said members and forming with a porthereby arranged to be journaled in the bearings, an expanding member connected with the lever, a plate mounted adjacent to the bracket, a binding post connected with the plate, an insulated binding post mounted on the plate, an adjustable insulated contact point on the plate and connected with the insulated binding post, an upstanding member on one end of theplate, a second plate mounted on said member and extending substantially parallel with the plate first mentioned, a contact member carried by the second plate and having connection with the binding postfirst mentioned, a hook on the aforesaid lever passing through an aperture in the second plate, and an adjusting device on the hook and spaced from its free end, said hook guiding the end of the lever and the adjusting device bearing against the lower side of the second plate for raising the latter and separating the contact members.

In testimony whereof I afiix my signature in presence of two witnesses.

BUDD WALL BRAVVNER.

Witnesses:

E. Fos'rna BRIGHAM, ALBERT G. INGRAM.

a lever, pins carried 

